Novel functionalized guanidinium ionic liquids: Efficient acid-base bifunctional catalysts for CO2 fixation with epoxides

Dai Wei-Li, Jin Bi, Luo Sheng-Lian*, Luo Xu-Biao, Tu Xin-Man, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)


A series of functional guanidinium-based ionic liquids (FGBILs) that contain both Lewis acid and basic sites was prepared by a simple method, and used as catalysts for the synthesis of cyclic carbonates through the cycloaddition of CO2 to epoxides in the absence of co-catalyst and solvent. Propylene oxide conversion was near completion at 130 C and 2.5 MPa in 2 h when [TMGC2H4NH2]Br was used as catalyst. The effects of functional groups and counter anions on catalytic performance were investigated. The synergistic effect of polarization by hydrogen bonding and the nucleophilic attack by bromide anion account for the facile ring-opening of epoxide. Furthermore, the protocol is applicable to a variety of terminal epoxides, producing the corresponding cyclic carbonates in high yield and selectivity. It is envisaged that the metal- and solvent-free process using a single catalyst has high potential for large-scale fixation of CO2.

Original languageEnglish
Pages (from-to)326-332
Number of pages7
JournalJournal of Molecular Catalysis A: Chemical
Publication statusPublished - 2013

Scopus Subject Areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

User-Defined Keywords

  • Carbon dioxide fixation
  • Cyclic carbonate
  • Cycloaddition reaction
  • Guanidinium-based ionic liquid


Dive into the research topics of 'Novel functionalized guanidinium ionic liquids: Efficient acid-base bifunctional catalysts for CO<sub>2</sub> fixation with epoxides'. Together they form a unique fingerprint.

Cite this